Replace mbedtls_x509_san_node with mbedtls_x509_subject_alternative_name

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 23e9844..1588be1 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -252,12 +252,12 @@
                 }
 
                 if (strcmp(q, "IP") == 0) {
-                    cur->node.name = (char *) ip;
-                    cur->node.len = sizeof(ip);
+                    cur->node.san.unstructured_name.p = (unsigned char *) ip;
+                    cur->node.san.unstructured_name.len = sizeof(ip);
                 } else {
                     q = r2;
-                    cur->node.name = q;
-                    cur->node.len = strlen(q);
+                    cur->node.san.unstructured_name.p = (unsigned char *) q;
+                    cur->node.san.unstructured_name.len = strlen(q);
                 }
 
                 if (prev == NULL) {